/* blog.biketourhanoi.com design system and UI layout */
:root {
  --primary: #052e16;
  --primary-hover: #14532d;
  --accent: #84cc16;
  --accent-light: #a3e635;
  --bg-main: #f0fdf4;
  --bg-card: #ffffff;
  --text-dark: #0f172a;
  --text-muted: #475569;
  --text-light: #f8fafc;
  --border: #e2e8f0;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow: 0 10px 30px -10px rgba(5, 46, 22, 0.08), 0 1px 3px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 40px -15px rgba(5, 46, 22, 0.15), 0 4px 6px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Quicksand', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-dark);
  line-height: 1.65;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  color: var(--primary);
  line-height: 1.25;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 20px -10px rgba(0, 0, 0, 0.05);
}

.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--primary);
}

.logo span {
  color: var(--accent);
}

.logo-img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-weight: 700;
  color: var(--primary);
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-cta {
  background: var(--primary);
  color: var(--text-light);
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 700;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--primary);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: radial-gradient(circle at top right, rgba(132, 204, 22, 0.12), transparent 40%),
              radial-gradient(circle at bottom left, rgba(5, 46, 22, 0.05), transparent 40%);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 30px;
}

/* Blog Grid */
.blog-section {
  padding: 60px 0 100px;
}

.section-title {
  margin-bottom: 40px;
  font-size: 2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition);
}

.card:hover .card-img {
  scale: 1.05;
}

.card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 12px;
}

.card-category {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-excerpt {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.card-link {
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
}

.card-link svg {
  transition: var(--transition);
}

.card:hover .card-link svg {
  transform: translateX(4px);
}

/* Post Detail */
.post-detail {
  padding: 60px 0 100px;
}

.post-header {
  max-width: 800px;
  margin: 0 auto 40px;
  text-align: center;
}

.post-meta-top {
  display: flex;
  justify-content: center;
  gap: 16px;
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 700;
}

.post-category-badge {
  background: rgba(132, 204, 22, 0.15);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 50px;
}

.post-header h1 {
  font-size: 2.75rem;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.post-hero-image {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 50px;
  box-shadow: var(--shadow);
}

.post-body {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-card);
  padding: 40px 48px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.post-body p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  color: #334155;
  line-height: 1.8;
}

.post-body h3 {
  font-size: 1.6rem;
  margin: 48px 0 20px;
  color: var(--primary);
}

.post-body h4 {
  font-size: 1.25rem;
  margin: 32px 0 16px;
  color: var(--primary-hover);
}

.post-body img {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin: 36px 0 10px;
  box-shadow: var(--shadow);
}

.post-body .img-caption {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 36px;
  display: block;
}

.post-body blockquote {
  border-left: 5px solid var(--accent);
  padding: 10px 0 10px 24px;
  font-style: italic;
  font-size: 1.25rem;
  color: var(--primary);
  margin: 36px 0;
  background: rgba(240, 253, 244, 0.5);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.post-body ul, .post-body ol {
  margin: 0 0 28px 24px;
  font-size: 1.05rem;
  color: #334155;
}

.post-body li {
  margin-bottom: 10px;
  line-height: 1.6;
}

.insight-box {
  background: #f0fdf4;
  border-left: 4px solid var(--accent);
  padding: 24px 28px;
  border-radius: var(--radius-md);
  margin: 40px 0;
}

.insight-box h5 {
  color: var(--primary);
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.insight-box p {
  margin-bottom: 0;
  font-size: 0.95rem;
  color: var(--text-dark);
}


/* Sidebar and Call to Action */
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, #14532d 100%);
  color: var(--text-light);
  padding: 40px;
  border-radius: var(--radius-lg);
  margin-top: 60px;
  text-align: center;
  box-shadow: var(--shadow-hover);
}

.cta-box h3 {
  color: var(--accent);
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-box p {
  color: rgba(248, 250, 252, 0.85);
  font-size: 1.1rem;
  margin-bottom: 24px;
}

.cta-btn {
  background: var(--accent);
  color: var(--primary);
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 800;
  font-size: 1.05rem;
  display: inline-block;
  box-shadow: 0 4px 14px rgba(132, 204, 22, 0.4);
}

.cta-btn:hover {
  background: var(--text-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
}

/* Footer */
footer {
  background: var(--primary);
  color: var(--text-light);
  padding: 60px 0 40px;
  margin-top: 100px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-logo {
  font-weight: 800;
  font-size: 1.5rem;
}

.footer-logo span {
  color: var(--accent);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 30px;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(248, 250, 252, 0.6);
}

/* Responsive & Layout Rules */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }
  .nav-links {
    display: none;
  }
  .post-header h1 {
    font-size: 2rem;
  }
  .post-body {
    padding: 30px 24px;
  }
}

/* Post Detail Header Wrapper (Full-width green) */
.post-detail-header-wrapper {
  background-color: var(--primary);
  color: var(--text-light);
  padding: 60px 0 50px;
  text-align: center;
  border-bottom: 4px solid var(--accent);
}
.post-detail-header {
  max-width: 900px;
  margin: 0 auto;
}
.post-detail-header .post-meta-top {
  justify-content: center;
  margin-bottom: 20px;
  font-size: 0.95rem;
}
.post-detail-header .post-category-badge {
  background: rgba(132, 204, 22, 0.2);
  color: var(--accent-light);
  font-weight: 700;
}
.post-detail-header h1 {
  color: var(--text-light);
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.post-excerpt-sub {
  font-size: 1.1rem;
  color: rgba(248, 250, 252, 0.85);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Two-column layout */
.post-detail-content-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
  margin-top: 40px;
}
.post-detail-main {
  min-width: 0;
}
.post-detail-sidebar {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 30px;
}
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}
.widget-title {
  font-size: 1.35rem;
  color: var(--primary);
  margin-bottom: 20px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 10px;
  font-weight: 800;
}
.sidebar-tours-list {
  display: grid;
  gap: 24px;
}

/* Sidebar Tour Card */
.sidebar-tour-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition: var(--transition);
}
.sidebar-tour-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.tour-img-wrapper {
  position: relative;
  height: 160px;
  overflow: hidden;
}
.tour-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.sidebar-tour-card:hover .tour-img-wrapper img {
  transform: scale(1.05);
}
.tour-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: #f59e0b;
  color: white;
  padding: 4px 10px;
  font-size: 0.7rem;
  font-weight: 800;
  border-radius: 4px;
  text-transform: uppercase;
  z-index: 2;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
.tour-badge.bestseller {
  background: #ea580c;
}
.tour-badge.popular {
  background: #0284c7;
}
.tour-card-body {
  padding: 16px;
}
.tour-card-title {
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.35;
  font-weight: 700;
}
.tour-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.tour-card-price {
  color: var(--text-muted);
}
.tour-card-price .price-val {
  color: #16a34a;
  font-weight: 800;
  font-size: 1.15rem;
}
.tour-card-rating {
  display: flex;
  align-items: center;
  gap: 4px;
}
.tour-card-rating .stars {
  color: #fbbf24;
  font-weight: bold;
}
.tour-card-rating .reviews-count {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.tour-card-btn {
  display: block;
  width: 100%;
  background: var(--primary);
  color: var(--text-light);
  text-align: center;
  padding: 10px 0;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
}
.tour-card-btn:hover {
  background: var(--accent);
  color: var(--primary);
}

@media (max-width: 992px) {
  .post-detail-content-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .post-detail-sidebar {
    position: static;
  }
}

/* Explore by Vehicle Section */
.explore-by-vehicle-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  max-width: 700px;
  margin: -10px auto 40px;
  font-size: 1.1rem;
  line-height: 1.5;
}
.vehicle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin-top: 30px;
}
.vehicle-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.vehicle-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.vehicle-card-img {
  height: 180px;
  overflow: hidden;
}
.vehicle-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.vehicle-card:hover .vehicle-card-img img {
  transform: scale(1.04);
}
.vehicle-card-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.vehicle-card-body h3 {
  font-size: 1.25rem;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 800;
}
.vehicle-card-body p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.5;
}
.vehicle-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.vehicle-links li a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
  display: inline-block;
}
.vehicle-links li a:hover {
  color: var(--accent-light);
  transform: translateX(4px);
}

/* Travel Directory Section */
.travel-directory-section {
  padding: 80px 0 100px;
  background: var(--bg);
}
.directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 30px;
}
.directory-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}
.directory-col h4 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
  font-weight: 800;
}
.directory-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}
.directory-col ul li a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
  display: inline-block;
  line-height: 1.4;
}
.directory-col ul li a:hover {
  color: var(--primary);
  font-weight: 600;
  transform: translateX(4px);
}
.text-center {
  text-align: center;
}